There’s nothing the coaches can do about the WR’s. Beane did not sign/trade for any high quality WR’s in the offseason and he didnt do so at the deadline either.
As for the play calls and route trees, yes - I do not think Brady is a good play caller. I was saying it all last year too while we were scoring a lot of points. @GunnerBill and I discussed how much I disliked his play calling because I foresaw how it would stop working against good teams and how he calls the same plays every week. He is utterly predictable. As for McDermott, It’s truly inexplicable how he continues to allow it to happen.
But if you don’t want to believe me, perhaps you will believe a former NFL wide receiver who echoes exactly what I said.